摘要
利用屋盖作为被动调谐质量阻尼器（ＴＭＤ）的质量块是解决ＴＭＤ附加质量问题的一种较好的方案。再利用屋盖与其支承结构之间的干摩擦替代粘滞阻尼，可构成调谐质量摩擦系统，使控制系统更加经济简练。针对干摩擦的特点提出了独立优化刚度，再优化摩擦系数的算法。该算法适应有限元格式和实际工程设计。数值模拟证实了调谐质量摩擦系统的摩擦力对刚度最优值的影响较小，而刚度对摩擦最优值的影响较大、规律较差的事实，论证了在无摩擦得到的优化刚度可以直接用于摩擦力优化中、用此方法设计调谐质量摩擦系统几乎能够达到最优配置。
It is a good idea that the building roof may be used as the mass of a tuned mass damp- er. If the friction between the roof and supports is used as damping to form tuned mass friction sys- tem, the structure becomes simple. According to this situation, a simplified optimization method is presented in which the systematic stiffness is optimized independently and then the systematic friction is optimized in the condition of the optimum stiffness. This method is suitable to finite element ana- lysis and practical design. It is approved by digital emulation that the friction has little effect on the optimum value of the stiffness and the stiffness has considerable irregular effect on the optimum val- ue of the friction. It is also demonstraed that the optimum stiffness can be computed without fric- tion, then the optimum stiffness can be used in the optimization of the friction, and combination of these two optimum values reaches almost the best status.
出处
《地震工程与工程振动》
CSCD
北大核心
2001年第3期122-126,共5页
Earthquake Engineering and Engineering Dynamics
基金
教育部结构工程与振动重点实验室基金资助
